Portable filling indicator for tanks and storage containers



FIG. 1 is a front elevational view of a portable filling indicator for tanks and storage containers showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a portable filling indicator for tanks and storage containers, as shown. 